INVESTIGATION OF LIFTING A LOAD USING AN INDUSTRIAL EXOSKELETON

2020 ◽  
Vol 6 ◽  
pp. 121-130
Author(s):  
S.F. YATSUN ◽  
O.G. LOKTIONOVA ◽  
A.V. MALCHIKOV ◽  
A.S. YATSUN
Keyword(s):  
Mathematical Modeling ◽  
Hip Joint ◽  
Evaluation Criteria ◽  
Original Method ◽  
Labor Costs ◽  
Urgent Task

The work is devoted to the urgent task of studying the features of functioning and assessing the effectiveness of using an industrial exoskeleton for the tasks of lifting, holding and storing cargo. A feature of the study is the use of an original method based on the interpolation of experimentally obtained data and their use in mathematical modeling of the behavior of the system. The proposed method and evaluation criteria make it possible to determine the operator's labor costs and the efficiency of using an exoskeleton, including those equipped with gravitational compensators in the hip joint. In this work, the time dependences of the torques in the hinges of the exoskeleton for various methods of performing the exercise and various parameters of assisting influences were obtained. The proposed toolkit can find application in the design and assessment of the effectiveness of exoskeletons of industrial anthropomorphic structures.

Technique of scientific and technical forecasting using neural networks

2018 ◽  
pp. 103-110
Author(s):  
V. V. Nefedev
Keyword(s):  
Mathematical Modeling ◽  
Neural Networks ◽  
Artificial Neural Networks ◽  
Original Method ◽  
Forecasting Methods ◽  
Expert Assessments ◽  
Artificial Neural

For the definition and implementation of breakthrough technologies the most important is the role of scientific and technical forecasting. Well-known forecasting methods based on extrapolation, expert assessments and mathematical modeling are not universal and have a number of significant disadvantages. The article proposes an original method of scientific and technical forecasting based on the use of the methodology of artificial neural networks. 

scholarly journals Analysis of the mixing efficiency of the components of the iron-phosphate mixture in the dry state

2021 ◽  
Vol 1,2021 (1,2021(126)) ◽  
pp. 23-27
Author(s):  
Selyverstov Vadim ◽  
Dotsenko Yurii
Keyword(s):  
Mixing Time ◽  
Experimental Studies ◽  
Iron Phosphate ◽  
Original Method ◽  
Cold Hardening ◽  
Mixing Efficiency ◽  
Experiment Research ◽  
Metal Component ◽  
Dispersed Particles ◽  
Urgent Task

The results of researches of influence of time of mixing of initial components in a dry condition on degree of assimilation of iron-containing component of forming and core iron-phosphate cold-hardening mixes are presented. The percentage of assimilation of the dispersed iron-containing component after each minute of mixing in laboratory runners with a total mixing time of 15 minutes was determined experimentally. Using the original method of particle separation, under the microscope were separated scale particles that were not assimilated (not distributed on the surface of the sand), and weighed them. The dependences of the degree of assimilation of the metal component of the iron-phosphate mixture on the mixing time at different initial contents are obtained. It is shown that the highest degree of absorption of the iron-containing component of iron-phosphate mixtures is achieved by mixing the components of the mixture for the first four to five minutes. Then this figure begins to decrease as the grains begin to collapse under the action of the rolls of the runners, and the forces of electrostatic interaction between the surfaces of the grains and the dispersion medium are reduced compared to the forces of mutual gravity between the dispersed particles of iron-containing component of the mixture. Based on the analysis of theoretical positions and the results of experimental studies, the assumption is made about the possibility of adjusting the conditions and parameters of solidification of phosphate binder systems, in particular using iron-containing filler of a certain dispersion and mixing the components in the dry state for some time. It is known that for mixing the components and assimilation of the required part of the iron-containing component of the mixture uses a significant amount of energy (depending on the type of unit used). To reduce the energy consumption of this process, the urgent task is to determine the degree of assimilation of the iron-containing component of phosphate cold-hardening mixtures in their manufacture by mixing the components in the dry state. Keywords: iron-phosphate cold-hardening mixture, mixing in the dry state, interaction, adhesion, experiment, research, dependence

scholarly journals Numerical method for solving problems of dynamics of marine complexes and ship auxiliary mechanism

2021 ◽  
Vol 2061 (1) ◽  
pp. 012081
Author(s):  
S A Osmukha
Keyword(s):  
Hydrodynamic Coefficients ◽  
Highly Qualified ◽  
Labor Costs ◽  
Orthogonal Functions ◽  
Urgent Task ◽  
Fixed Assets ◽  
Open Process ◽  
Reducing Costs ◽  
Working Out ◽  
Auxiliary Mechanism

Abstract The article describes the study of methods of hydrodynamic coefficients using finite volumes, as well as numerical methods based on the study of data from the air tube experiment.The methods of converting the data of air tube experiments when working out the elements of the fixed assets of the fleet in the bases of orthogonal functions (bursts) were investigated and described. The study is based on the obtained mathematical models of processes using the methods of multi-turn engineering design, methods for constructing computer models in a structure that provides for an open process of developing and approving proposed project elements.An urgent task is to develop methods for reducing costs associated with the design and creation of marine infrastructure facilities and fixed working capital. The relevance of the tasks follows from the expensive cycles of project development, the labor costs of highly qualified specialists.

scholarly journals To the question on conducting anti-corruption examination of normative legal acts using a mathematical model

2020 ◽  
pp. 38-46
Author(s):  
Mariya Sergeevna Bakhtina
Keyword(s):  
Mathematical Modeling ◽  
Fuzzy Sets ◽  
Computer Technology ◽  
Information Technologies ◽  
Labor Costs ◽  
Physical Content ◽  
Source Data ◽  
Solution Methods ◽  
Content Specificity ◽  
Theory Of Fuzzy Sets

This article considers the possibility of conducting anti-corruption examination using fuzzy mathematical modeling. The author substantiates the characteristics of propensity for corruption of laws, for which is obtained functional dependency on the types and number of corruptiogenic based on the fuzzy conclusion. Predictive anti-corruption valuation should be based on certain criteria, which are currently absent and replaced by the professional knowledge, experience and competences of the expert. Attention is given to the method of expert research using mathematical models of fuzzy sets. The problems dealt with in jurisprudence fully correspond to the theory of fuzzy sets by physical content, specificity of source data, nature of data, and solution methods. Application of this model, including by state and municipal executive branches, would allow to significantly reduce the timeframe  of conducting anti-corruption examination, lower labor costs and probability of expert error, unify the results of anti-corruption examination, and classify normative legal acts depending on the category of corruption risk for further tasks. The absence of scientific developments in this field impedes the implementation of advanced information technologies in legal science and practice. This method allows to make greater use of modern achievements in allied fields, first and foremost, in computer technology.

scholarly journals ВЫБОР ЧИСЛЕННЫХ МЕТОДОВ ПРИ МОДЕЛИРОВАНИИ ДИНАМИКИ СИСТЕМ

2016 ◽  
Vol 53 (3) ◽  
pp. 98
Author(s):  
Tetiana D. Panchenko ◽  
Iryna A. Tuzova ◽  
Volodymyr V. Chelabchi ◽  
Viktor M. Chelabchi
Keyword(s):  
Mathematical Modeling ◽  
Adaptive Control ◽  
Approximate Solution ◽  
Estimation Error ◽  
Main Tool ◽  
Grid Method ◽  
Adaptive Method ◽  
Original Method ◽  
Dynamic Processes ◽  
Nonlinear Functions

The article deals with the creation of methodical support for mathematical modeling of dynamic processes in elements of the systems and complexes. As mathematical models ordinary differential equations have been used. The coefficients of the equations of the models can be nonlinear functions of the process. The projection-grid method is used as the main tool. It has been described iterative method algorithms taking into account the approximate solution prior to the first iteration and proposed adaptive control computing process. The original method of estimation error in the calculation solutions as well as for a given level of error of the technique solutions purpose adaptive method for solving configuration parameters is offered. A method for setting an adaptive method for solving the settings for a given level of error is given. The proposed method can be used for distributed computing.

scholarly journals Mathematical modeling of human walking under combined hip joint contracture

TRAUMA ◽  
2019 ◽  
Vol 20 (4) ◽  
pp. 93-98
Author(s):  
V.A. Fishchenko ◽  
A.Yu. Branitsky ◽  
A.V. Gotsul ◽  
E.D. Karpinskaya
Keyword(s):  
Mathematical Modeling ◽  
Hip Joint ◽  
Joint Contracture ◽  
Human Walking

Virtual Model and Simulation of the Normal and Affected Human Hip Joint

2016 ◽  
Vol 823 ◽  
pp. 167-172 ◽  
Author(s):  
Daniel Calin ◽  
Daniela Tarniţă ◽  
Dragos Popa ◽  
Dan Calafeteanu ◽  
Dan Tarnita
Keyword(s):  
Hip Joint ◽  
Ct Scanning ◽  
Original Method ◽  
Ansys Software ◽  
Hip Joints ◽  
Element Analysis ◽  
Model And Simulation ◽  
Mechanical Assemblies ◽  
3D Software ◽  
Anatomical Information

To generate a virtual human hip is a main goal for our research team. Also, starting from the normal virtual hip joint and using the important orthopedics information was defined the affected hip joint. All these models were generated in a 3D virtual environment starting with CT scanning images. Using an original method all the scanned CT images were re-defined and re-drawn and transferred to the 3D software. The resulted curves were used to generate the bones and the virtual complex system of both hip joints. With motion and geometric constrains the bio-mechanical assemblies were defined, starting from anatomical information. The normal hip joint and the model of the affected hip were defined and exported to ANSYS, software based on Finite element analysis.

scholarly journals Mathematical modeling in the process of designing launch systems for marine robotic systems

2021 ◽  
pp. 238-244
Author(s):  
Р.В. Красильников ◽  
С.С. Жарова
Keyword(s):  
Mathematical Modeling ◽  
Methodological Approach ◽  
Arctic Region ◽  
Robotic Systems ◽  
The Arctic ◽  
Design Parameters ◽  
Labor Costs ◽  
Work Related ◽  
Modern Development ◽  
Launch Systems

Одним из востребованных направлений в современном развитии передовых в техническом плане стран является создание робототехнических систем и комплексов разного базирования. Одним из приоритетных направлений использования телеуправляемых необитаемых подводных аппаратов остаются поисковые работы, связанные с обнаружением и обследованием подводных объектов. Актуальность данных работ определяется расширением областей применения аппаратов, в том числе в Арктическом регионе России в рамках работ по освоению континентального шельфа. В статье раскрыт общий методологический подход к проектированию пусковых систем, согласованный с требованиями нормативных документов, определяющих порядок разработки новых образцов техники. Показана роль математического моделирования в рамках процесса создания пусковых систем. В качестве основы методического подхода к математическому моделированию предложен единый математический аппарат обоснования проектных параметров пусковых систем. Показаны рациональные по времени и трудозатратам подходы к оценке адекватности математических моделей процессов пуска, базирующиеся на сравнении экспериментальных и расчетных величин перемещения и ускорений движущихся элементов. One of the demanded directions in the modern development of technically advanced countries is the creation of robotic systems and complexes of various bases. One of the priority areas for the use of remotely controlled unmanned underwater vehicles remains search work related to the detection and examination of underwater objects. The relevance of these works is determined by the expansion of the areas of application of the vehicles, including in the Arctic region of Russia as part of the work on the development of the continental shelf. The article discloses a general methodological approach to the design of launch systems, consistent with the requirements of regulatory documents that determine the procedure for the development of new models of equipment. The role of mathematical modeling in the process of creating launch systems is shown. A unified mathematical apparatus for substantiating the design parameters of launch systems is proposed as the basis for a methodological approach to mathematical modeling. The rational in terms of time and labor costs approaches to assessing the adequacy of mathematical models of start-up processes, based on a comparison of experimental and calculated values of displacement and acceleration of moving elements, are shown.

scholarly journals Mathematical Modeling of Knowledge-Intensive Products Export Energy Costs

2022 ◽  
Vol 17 ◽  
pp. 1-8
Author(s):  
V. Veretekhina Svetlana
Keyword(s):  
Mathematical Modeling ◽  
High Reliability ◽  
Energy Costs ◽  
Practical Calculation ◽  
Labor Costs ◽  
Systematic Analysis ◽  
Reliability Indices ◽  
Support Measures ◽  
Knowledge Intensive ◽  
Integrated Logistical Support

This article presents the mathematical modeling of export energy costs. The knowledge-intensive products export energy costs are a set of financial, material, labor costs and resources consumption. Export costs are a multilevel system of indicators. The author sets out the order of mathematical modeling. At the first stage, the main trends in reducing export energy costs are identified. A set of integrated logistics support measures is modeled. The modeling of knowledge-intensive products export energy costs is a system of technical and economic indices and a cost value dependance: Maintenance and Repair, Material and Technical Maintenance, Business Model of After-Sales Service, Formation of the Cost of Insurance and Investment Management Strategy. Formulas, practical calculation examples and graphs are presented. The Ishikawa systematic analysis method is used to visualize data and dependence relations. The author's mathematical modeling of knowledge-intensive products export costs includes the calculation of integrated logistic support costs. Exporting countries require a high level of technical products efficiency. It has been established that "the more complex a knowledge-intensive products is, the higher the reliability of systems is". Reliability indices are basic. The author's scientific study confirms a hypothesis of the knowledge-intensive products export feasibility only with high reliability and efficiency factors. The author developed a set of integrated logistical support measures for knowledge-intensive products.

scholarly journals Original positioning method to determine the clinical and radiographic parameters of the hip joint in patients with cerebral palsy

2021 ◽  
Vol 13 (4) ◽  
pp. 90-93
Author(s):  
Yatsulіak M ◽  
Nemesh M ◽  
Martsyniak S ◽  
Kabatsiy M ◽  
Filipchuk v
Keyword(s):  
Cerebral Palsy ◽  
Hip Joint ◽  
Developmental Disorders ◽  
Original Method ◽  
Hip Joints ◽  
Femoral Torsion ◽  
Neck Shaft Angle ◽  
Radiographic Parameters ◽  
Medical Institutions ◽  
Positioning Method

Relevance: Obtaining true radiographic parameters of the hip joint helps to choose therapeutic tactics for children with cerebral palsy. Goal of the study: Improvement of the diagnostic results in pathology of the hip joint among patients with cerebral palsy by using our original method. Materials and methods: The number of examined patients – 30 persons (60 joints), 15 boys and 15 girls, 26 joints were operated. The age of patients ranged between 3-15 years. All patients underwent a clinical evaluation – Ruwe's femoral torsion, as well as radiography of the hip joints using our original method (utility model patent №137567). The offered method is cheap, simple and accessible to all medical institutions with an X-ray room, for the diagnosis and screening of pathology of the hip joint. The our original method can be used to determine all the main parameters of the hip joint (femoral torsion, neck-shaft angle, Viberg angle, Reimers’ index, acetabular angle, Sharp’s angle) in patients with cerebral palsy. Making only single radiograph, one obtains true radiographic parameters of both hip joints, which significantly reduces the radiation load upon the patient. Our method can be used in the examination and screening of patients with developmental disorders and other diseases of the hip joint.

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